H II region
Videos
An H II region is a region of interstellar atomic hydrogen that is ionized. It is typically in a molecular cloud of partially ionized gas in which star formation has recently taken place, with a size
NGC 604, a giant H II region in the Triangulum Galaxy, taken by the Hubble Space Telescope
Dark star-forming regions within the Eagle Nebula commonly referred to as the Pillars of Creation
Orion Nebula
A small portion of the Tarantula Nebula, a giant H II region in the Large Magellanic Cloud
Interstellar medium
Videos
The interstellar medium is the matter and radiation that exists in the space between the star systems in a galaxy. This matter includes gas in ionic, atomic, and molecular form, as well as dust and co
Voyager 1 is the first human made object to reach the interstellar medium.
Three-dimensional structure in Pillars of Creation.
Interstellar medium and astrosphere meeting
This light-year-long knot of interstellar gas and dust resembles a caterpillar.